參數(shù)資料
型號(hào): MC68HC05C9A
廠商: Motorola, Inc.
元件分類: 8位微控制器
英文描述: 8-Bit Microcontroller(8位微控制器)
中文描述: 8位微控制器(8位微控制器)
文件頁數(shù): 47/160頁
文件大小: 783K
代理商: MC68HC05C9A
Resets
Computer Operating Properly (COP) Reset
MC68HC05C9A
Rev. 4.0
General Release Specification
MOTOROLA
Resets
47
L
G
R
5.5.1 COP Reset Register
This write-only register, shown in
Figure 5-4
, is used to reset the COP.
The sequence required to reset the COP timer is as follows:
Write $55 to the COP reset register
Write $AA to the COP reset register
Both write operations must occur in the order listed, but any number of
instructions may be executed between the two write operations provided
that the COP does not time out between the two writes. The elapsed
time between software resets must not be greater than the COP timeout
period. If the COP should time out, a system reset will occur and the
device will be re-initialized in the same fashion as a power-on reset or
reset.
Reading this register does not return valid data.
$001D
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Write:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset:
0
0
0
0
0
0
0
0
= Unimplemented
Figure 5-4. COP Reset Register (COPRST)
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